Pneumatic hammer



(No Model.)

G. GLOSSOP.

PNEUMATIC HAMMER.

No. 394,483. Patented Dec. .11, 1888.

UNITED STATES PATENT OFFICE.

GILBERT GLOSSOI, OF SHEFFIELD, COUNTY OF YORK, ENGLAND, ASSIGNOR,

BY DIRECT AND MESNE ASSIGNMENTS, TO FREDERICK CLEMENT BROOKS- BANK AND JACOB l3. PERKINS, BOTH OF CLEVELAND, OHIO.

PNEUMATIC HAMMER.

SPECIFICATION forming part of Letters Patent No. 394,483, dated December 11, 1888.

Application filed September 16, 1887. Serial No. 249,858. (No model.) Patented in England February 3, 1887, No. 1.706.

To all whom it may concern;-

Be it known that I, GILBERT GLossoP, a subject of the Queen of Great Britain, residing at Sheffield, in the county of York, England, have invented certain new and useful Improvements in Pneumatic Hammers; and I do hereby declare that the following is a full, clear, and exact description of the i11- vention, which will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to improvements in pneumatic hammers, (which have been patented to me in England February 3, 1887, No. 1,706,) and it consists in a brake applied to the tup or ram, whereby the action of said tup or ram may be regulated and controlled in respect to the weight of its stroke, all as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation of a pneumatic hammer embodying my invention, Fig. 2 is a section of one of the supporting-standards, showing the inside thereof with the brake attached. Fig. 3 is a cross-section of Fig. 1, showing the brake mechanism. Fig. 4 is a perspective of the upper part of the machine.

My invention, as here illustrated, is embodied in a pneumatic hammer having an aircylinder, to which a reciprocating motion is given by means of a connecting-rod attached to a crank driven by a pulley and belt, the tup or hammer-block being secured to the piston-rod of the air-cylinder.

A and B are the standards forming the frame of the machine.

C is a crank-shaft carrying a pulley by which the shaft is turned, and a fly-wheel, all of a well-known form.

D is an air-cylinder pivota-lly attached to the conn ect-ing-rod d, which works on a crank on the shaft C, as seen in Fig. 4, whereby the said cylinder is vertically reciprocated.

E is the tup, hammer-head, or ram, working in guides in the standards A B, and connected by a rod, 2, with a piston, 6, within the cylinder D.

F is the brake-block, let into the inside of the standard A in such a manner that it can be forced against the side of the tup or hammer-head E with as much pressure as shall be desired or necessary by means of the wedge G, which slides in a tapered recess in the standard A. The wedge G is operated by means of a slotted arm, II, fixed on a shaft, I, which in turn is controlled by ahand-lever, J, alone, or by a foot-lever, K, connected by link It with said hand-lever.

The object of the brake mechanism is to furnish means whereby the force of the blow delivered by the hammer may be absolutely controlled, and the same be graduated from a full and undiminished blow down to the lightest touch or actual locking of the tup. The frictional action of the brake renders it practicable to graduate the weight of the blow to the utmost nicety. Of course the means of operating the brake and the construction thereof may be materially changed from that here shown and still be within the scope and spirit of my invention, as I regard the invention as covering, broadly, a brake applied to the tup to control the same, as herein described, whether it be of this exact form or of the equivalent thereof in substance and effect.

The subject-matter of this invention is likewise shown and describedin connection with other matter in my application filed April 17, 1888, Serial No. 270,906; but the claims in the two cases are distinctly different.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In pneumatic hammers, a tup and a friction-brake which bears immediately against the tup at the side thereof, substantially as set forth. o

2. In pneumatic hammers, a supportingframe and a tup, in combination with a brakeblock set into the frame opposite the tup, and a pressure-piece to bear against said block and regulate the stroke of the tup, substantially as set forth.

GILBERT GLOSSOP.

lYitnesses:

FRANCIS BUCHANAN, Time-K'ecper, Heele'y, Sheflield.

CLEMENT TODD, Clerk to 1111. Herbt. Bramlez S0Zr., Shefiield. 

